Dual-mass damper



FIG. 1 is a front elevation view.

FIG. 2 is a cross-sectional view taken along line 2—2 of FIG. 1.

FIG. 3 is a rear elevation view.

FIG. 4 is a side view; and,

FIG. 5 is a front perspective view.

The broken line showing of the dual-mass damper is included for thepurpose of illustrating portions of the dual-mass damper and forms nopart of the claimed design.

The ornamental design for a dual-mass damper, as shown and described.